Second look, unfortunately, is pointless as the rank listing is finalized at the end of the last interview day. Because departments rely on heavy consensus to determine their rank lists, one small move post-interview will not change the rank list.
So, sadly, trying to go on second look is pointless. Sending thank you cards is pointless. Emailing and chatting people up after you interview are pointless. In fact, it's embarrassing for you and for your contacts in the department because the faculty knows where you rank but can't reveal it. When I was an applicant, I did not realize this, and of course did all these postinterview moves that were useless.
This is not meant to be harsh, just real.